Elevator



(No Model.)

HV. ROBERTS.

ELEVATOR.

NoafZ'gOl. Patented Jan. 24,1882.

l F1551- f H552. :F64 3 4- i f Il 4 'G cf .bll

`/P -E'2 Il 6:7 Us 163 i l ZI-,

- l e lNVEN-Vui J/wq:

N, FETERS. Pmwumagupnur. wuhingwn, l1 C4 UNTTBD STATES PATENT einen.

HENRY ROBERTS, OF HARTFORD, CONNECTICUT.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 252,801, dated January 24, 1882.

l Application filed November 15, 1881. (Xo model.)

for the vertical doorways of elevator shafts or wells which will be opened and closed automatically by the movement of the elevatorcage, andwill be efficient and. convenient in use; and my invention therein consists in thenovel means employed by me for this purpose, as fully hereinafter explained, and pointed out by the claims.'

In the accompanying drawings, forming a 'part hereof, Figure lis a vertical section of the elevator-shaft, the doors, and the cage; and Fig. 2, a view of the doors from the interior of the elevatorshaft, the weight-wells being uncovered to show the counter-weights.

Like letters denote corresponding parts in both ligures.

A is an elevator shaft or well, and B the cage moving therein.

C' C2 C3 C4 represent the. vertical openings from the several 'floors of the building into the elevator-shaft. Four openings are shown; but the number will correspond with the stories of the building, and may be more or less than four. These four openings or doorways are closed by six doors, D' D2 D3 and E' E2 E2, which slide vertically in three sets of ways or grooves, a' a2 a3, formed in vertical pieces F F', secured within the elevator-shaft at the sides of the doorways. The doors D' D2 DS slide in the ways a' c2 a2 from the top ot' the shaft downwardly and close the openings C' C2 C2. These doors drop by their own weight and are raised by the elevator-cage. The doors D' D2 are arrested opposite openings C' C2 by stops b' b2, placed in the grooves a' a2, while door D2 is arrested opposite opening CS by a stop, 112,011 the side ot piece F', the door being provided with an arm, b4, to engage said stop. Tile elevator-cage is provided on its top with an arm, Gr,whicl1 engages with the bottom edge ofthe door D3 and raises the same. This door D2 has a cleat, c, on its bottom edge,which catches the lower end of door D2. and carries D2 up with it. The cleat c, however, will not reach D', since it must be made to clear the in ward extensions, d d', ofthe sills to doorways l C2 C2, which extensions are provided to till up the space between the sills and' the doors, for which purpose the cleat c is also used. The door D' has at or near its upper end a block, c, which is struck by door D2, causing D' to be carried up with D2 and D2.

The doors E' E2 E3 slide upwardly in the grooves a' t2 c2 from the bottom of the eleva- Itor shaft or well. They are 'raised to positions in doorways C4 C3 C2 by means of counterweights H' H2 H2, which move in wells I, and are connected with the doors by wire or hemp ropes or cords or by chains passing over. pulleys in the pieces F F'. -The doors E' E2 are arrested in their upward movement opposite doorways C4 C2, respectively, by stops j" f2, situated in the grooves a' a2, below stops b' b2, while door 2 is arrested in doorway C2 by a stop, f2, on piece F, the door being provided with an arm, f", to engage said stop.

The elevator-cage has a projecting sill, K, which works close to the extensions d d' of the door-sills of C2 C2, and strikes the upper ends --of doors E2 E2, pushing them down as it descends. The door E' has a block, JL, which is struck by door E2, causing E' to be pushed down with E3 and E2. By means of these two sets of doors the doorways will be opened and closed automatically by the movement of the cage.,l The doors D3 and E3 have their stops outside of groove a2 on pieces F F', because each door passes the stop of the other, door in its movement.

It will be seen that with the arrangement shown of two sets of vertical doors each set has one less door than the full number otl doorways. Each vertical doorway is always closed by a door, or the elevator-cage itself is in position opposite the saine, or it is partly closed by a door and partly filled by the cage, as is the casein the opening and closing ofthe doorways by the movement ofthe cage. For this reason vmy invention provides a safeguard against the many accidents which occur by reason of the doorways to elevator-shafts being left. open. The doors being automatically operated by the elevator-cage, they do not require any attention. The doorways are made the full width of the elevator-shaft, and so are ICO the doors, which will permit, in case of passen ger-elevators, of the ra pid filling and emptying of the cage-an advantage in large buildings or public places, where the elevators are crowded and delay is caused by small exits and entrances.

It will be understood that any suitable inaterial may be used for the several parts described. Any number of counter-weights can also be employed to raise the doors of the lower set. Two counter-weights for each door are preferred, in order to balance the door and make it work smoothly, although, for clearness, only one is shown in the drawings,

The several parts can be changed in detail of construction and arrangement without departing from the spirit ot my invention.

said platform are raised thereby and drop into position by their own weight.

1. In elevators, the combination, with the elevator shaft or well having vertical doorways and the elevator-cage, ot" two sets of vertical doors, one above and one below the cage, the doors above the cage being raised thereby and dropping by their own weight, while those below the cage are pushed down thereby and raised by counter-weights, and stops for arresting the doors ot' each set in succession, substantially as set forth.

2. In elevators, the elevator-cage having projections, in combination with the two sets of doors sliding in vertical ways and raised and pushed down respectively by the projec` y tions on the cage, substantially as set forth.

HENRY ROBERTS.

Witnesses:

ARTHUR N. STORY, J. E. GoDBEn. 

